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Factors and Coprimes 1/1



1. Find the number of factors of 64.
a. 2
b. 5
c. 7
d. 9


2. Find the number of factors of 64 which are even.
a. 6
b. 7
c. 4
d. 3


3. Find the number of factors of 64 which are perfect squares
a. 4
b. 5
c. 6
d. 7


4. Find the number of factors of 64 which are perfect cubes.
a. 6
b. 9
c. 4
d. 3


5. How many numbers below 100 have exactly 2 factors.
a. 25
b. 10
c. 17
d. 18


6. How many factors of 81 are odd.
a. 4
b. 5
c. 1
d. 2